Women who carrying a BRCA1 or BRCA2 gene mutation or who are the first- or second-degree relative of an individual with a BRCA-associated cancer in a family documented to have a BRCA1 or BRCA2 mutation will be eligible for enrollment into this pilot study of breast cancer screening modalities. We will recruit up to fifty women (twenty-five women who carry an altered BRCA1 or BRCA2 gene and 25 non-carriers matched by age and family mutation type) with regular menstrual cycling (documented by menstrual history and premenopausal FSH level). A physical exam including exam of the breast and pelvis, a standard four view mammogram, breast MRI and PET scan will be scheduled initially during either the follicular or mid-luteal phase of the menstrual cycle. A unilateral cranio-caudal mammogram, and bilateral MRI and PET scan will be repeated three months after entry during the phase not initially studied. A CA125 and transvaginal color doppler ultrasonography will be done in the follicular phase. Carriers and non-carriers will be compared with respect to menstrual cycle differences in: (1) two measures of mammographic density (qualitative and semiquantitative); (2) a semiquantitative measure of fibroglandular volume (MRI); (3) a semiquantitative measure of contrast enhancement (MRI); and (4) FDG uptake measured over time (PET scan). On the initial and three-month visit, all participants will undergo breast duct lavage to investigate if there are consistent menstrual cycle differences in breast ductal cytologies. Participants will be seen annually thereafter for an additional three years of follow-up. A physical exam, standard four-view mammography, breast MRI, CA 125, transvaginal color doppler ultrasonography and breast duct lavage will be done annually. Consent for a PET study will be requested if an abnormality is detected on mammography or breast MRI requiring additional clinical or radiographic follow-up.

Participants in the menstrual Cycle Pilot Study, will complete a self-administered questionnaire and telephone interview and will complete periodic follow-up questionnaires to assess various behavioral and psychosocial endpoints.

As part of the menstrual Cycle Pilot Study, we will recruit 25 volunteers to assist in training study investigators in performing breast duct lavage. Cytologies obtained from volunteers will be used to develop oncogene probe panels to be used in the study.

Eligibility

ELIGIBILITY CRITERIA:

Inclusion Criteria - menstrual Cycle Study:

To participate in the menstrual Cycle Pilot Study, a woman must:

Must be at least 25 years of age (or 5 years younger than the age at diagnosis of the youngest family member with a tumor associated with the breast-Ovarian Cancer Syndrome) and less than 46 years of age.

Must be premenopausal as determined by menstrual history (no change in menstrual pattern in prior 6 months) and an FSH level less than 15 mIU/ml obtained on the third day of the menstrual cycle.

Have undergone genetic counseling and risk assessment.

Must be a known mutation carrier or be a first- or second-degree relative of an individual with a tumor associated with the breast-Ovarian Cancer Syndrome in a family with a known BRCA mutation.

Agree to release of genetic test result for stratification purposes, whether or not she has chosen to receive individual test results for clinical decision-making.

Be willing to use non-hormonal methods of contraception until completion of the 3 month follow-up studies.

Have an ECOG performance status of 0-1.

Be able to provide informed consent.

Exclusion Criteria - menstrual Cycle Study:

Any of the following will result in exclusion from the menstrual Cycle Pilot Study:

A history of menstrual cycle irregularities over the previous 6 months, including history of cycles less than 26 days or more than 35 days.

Medical or psychiatric disorder which, in the opinion of the Principal Investigator, would preclude informed consent or ability to participate in clinical research.

Inclusion Criteria - Training Cohort:

To participate in the Training Cohort a volunteer must:

-Be female and at least 18 years and less than 51 years of age.

-Have at least one breast considered eligible for study.

-Provide evidence (either films or radiologist's report) of a mammogram done within the 12 months prior to enrollment showing low or no suspicion of carcinoma in at least one breast. (Mammograms will not be provided to participants as part of the training cohort.)

-Have a physical examination of the breast to be studied consistent with low or no suspicion of carcinoma at the time of enrollment.

-Provide the name of a primary care physician to whom the results of breast duct lavage cytologies can be sent.

-Have signed the informed consent for breast duct lavage.

Exclusion Criteria - Training Cohort:

Any of the following will exclude a potential participant from the Training Cohort:

-Pregnancy or lactation within the past 12 prior to enrollment.

-Subareolar or other surgery of the breast to be studied (papilloma resection, biopsy or fine needle aspirations which might disrupt the ductal systems within 2 cm of the nipple. (Biopsies of fine needle aspirations of the breast greater than or equal to 2 cm from the nipple are acceptable.)

-A breast implant or prior silicone injections in the breast to be studied.

-Radiation therapy to a breast to be studied.

-Active infections or inflammation in a breast to be studied.

-Chemotherapy or a selective estrogen receptor modifier (e.g., tamoxifen or raloxifen) taken within 12 months prior to enrollment.